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TL(4)			   BSD Programmer's Manual			 TL(4)

NAME
     tl - Texas Instruments ThunderLAN Ethernet driver

SYNOPSIS
     tl* at pci? dev ? function ?

DESCRIPTION
     The tl driver provides support for PCI Ethernet adapters based on the
     Texas Instruments ThunderLAN Ethernet controller chip. This includes a
     large number of Compaq PCI-bus Ethernet adapters as well as the integrat-
     ed Ethernet controllers built in to several models of Compaq Prosignia
     servers and Compaq Deskpro desktop machines. This driver also supports
     the Olicom OC-2135/2138, OC-2325 and OC-2326 10/100 TX UTP adapters and
     the Racore 8165 10/100baseTX and 8148 10baseT/100baseTX/100baseFX multi-
     personality cards.

     The ThunderLAN controller has a standard MII interface that supports up
     to 32 physical interface devices (PHYs). It also has a built-in 10baseT
     PHY hardwired at MII address 31, which may be used in some 10Mbps-only
     hardware configurations. In 100Mbps configurations, a National Semicon-
     ductor DP83840A or other MII-compliant PHY may be attached to the
     ThunderLAN's MII bus. If a DP83840A or equivalent is available, the Thun-
     derLAN chip can operate at either 100Mbps or 10Mbps in either half-duplex
     or full-duplex modes. The ThunderLAN's built-in PHY and the DP83840A also
     support autonegotiation.

     The tl driver supports the following media types:

     autoselect	  Enable autoselection of the media type and options. Note
		  that this option is only available on those PHYs that sup-
		  port autonegotiation. Also, the PHY will not advertise those
		  modes that have been explicitly disabled using the following
		  media options.

     10baseT	  Set 10Mbps operation.

     100baseTX	  Set 100Mbps (Fast Ethernet) operation.

     10base5	  Enable AUI/BNC interface (useful only with the built-in
		  PHY).

     The tl driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     hw-loopback  Enable hardware loopback mode.

     Note that the 100baseTX media type is only available if supported by the
     PHY. For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS
     tl%d: couldn't map memory	A fatal initialization error has occurred.

     tl%d: couldn't map interrupt  A fatal initialization error has occurred.

     tl%d: device timeout  The device has stopped responding to the network,
     or there is a problem with the network connection (cable).

     tl%d: no memory for rx list  The driver failed to allocate an mbuf for
     the receiver ring.

     tl%d: no memory for tx list  The driver failed to allocate an mbuf for
     the transmitter ring when allocating a pad buffer or collapsing an mbuf
     chain into a cluster.

SEE ALSO
     arp(4), ifmedia(4), intro(4), netintro(4), pci(4), hostname.if(5),
     ifconfig(8)

HISTORY
     The tl device driver first appeared in FreeBSD 2.2. OpenBSD support first
     appeared in OpenBSD 2.4.

AUTHORS
     The tl driver was written by Bill Paul <wpaul@ctr.columbia.edu>.

MirOS BSD #10-current		 May 1, 1998				     1
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